R > M and M > R with the DTX xFM

You've just tested a duplex fiber and the DTX CableAnalyzer has failed on one of the fibers. Looking at the test result, we see it failed on the fiber designated (Remote > Main). So which of our two fibers is the one that is failing?

Highlighted Remote to Main Loss Check with Fail Result

The designation is either R>M or M>R. The first letter is always the output fiber. So R>M would be the fiber that is connected to the output port of the Remote.

DTX xFM Fiber Adapters R to M and M to R Loss Check